EP2049958A2 - Systeme et methode de gestion de l'utilisation des outils - Google Patents

Systeme et methode de gestion de l'utilisation des outils

Info

Publication number
EP2049958A2
EP2049958A2 EP07813812A EP07813812A EP2049958A2 EP 2049958 A2 EP2049958 A2 EP 2049958A2 EP 07813812 A EP07813812 A EP 07813812A EP 07813812 A EP07813812 A EP 07813812A EP 2049958 A2 EP2049958 A2 EP 2049958A2
Authority
EP
European Patent Office
Prior art keywords
tool
tools
source
matched
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07813812A
Other languages
German (de)
English (en)
Other versions
EP2049958B1 (fr
Inventor
Stefan Okrongli
Robert J. Gorgol
Aleksandr Shkiler
Gerald Traicoff
Kishore Lankalapalli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hurco Companies Inc
Original Assignee
Hurco Companies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hurco Companies Inc filed Critical Hurco Companies Inc
Publication of EP2049958A2 publication Critical patent/EP2049958A2/fr
Application granted granted Critical
Publication of EP2049958B1 publication Critical patent/EP2049958B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/408—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by data handling or data format, e.g. reading, buffering or conversion of data
    • G05B19/4083—Adapting programme, configuration
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/32—Operator till task planning
    • G05B2219/32422—Tool management and database management
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/36—Nc in input of data, input key till input tape
    • G05B2219/36231—Translate, convert machine independent to machine dependent program
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/26—Cutting by use of rotating axially moving tool with means to condition tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/31—Convertible cutting means
    • Y10T408/33—Utilizing common cutting Tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/34—Combined cutting means

Definitions

  • the present invention relates generally to managing the use of tools loaded onto or associated with a computer numerically controlled (“CNC") machine, and more particularly to algorithms for matching tools required by a program for creating a machined part to tools available for use by a particular machine or at least described by data accessible by the machine.
  • CNC computer numerically controlled
  • CNC machines use various tools (e.g., drills, end mills, reamers, taps, etc.) held by a movable, rotating spindle under the control of a program to form material such as metal into predetermined shapes or "parts.” Often several different tools are required to create a part from stock material, each tool performing a function as specified by the part program. Many CNC machines have an associated automatic tool changer ("ATC") to speed the process of changing tools during execution of a part program. As is known in the art, such ATCs have many tool stations, each holding a particular tool which the ATC automatically indexes to a loading position for mounting to the spindle as required by the part program. Tools may also be changed manually.
  • tools e.g., drills, end mills, reamers, taps, etc.
  • MTC manual tool changer
  • the operator had to determine from the part program the tools necessary to complete the part, and ensure that those tools were loaded, for example, in the ATC tool station locations expected by the part program.
  • the operator could modify the part program to reflect the actual location of the tool. Either way, the operator had to determine what tools were needed, identify the available tools, manually match the available tools with the needed tools, and correlate the actual locations of the available tools with the location designations of the needed tools specified by the part program. This process is slow and subject to error.
  • the present invention provides a system and method for tool use management wherein the CNC machine retains information identifying the available tools for the machine as well as their current locations, and executes an algorithm for determining the tools needed by the part program (hereinafter, "source tools") and matching the source tools with the available tools.
  • source tools the tools needed by the part program
  • Each machine's memory or a distributed memory, as further described below
  • tool information including the actual location of the tool
  • the part program is modified based on that tool information to correlate the source tools with the available tools. Consequently, the part program may be executed on any of a plurality of machines, each having a different configuration of available tools, without manually changing the locations of the available tools or manually modifying the part program to reflect the locations of the available tools.
  • the machine's memory may also retain information describing tools that are not currently available at the machine. Source tools may be matched to these unavailable tools to perform virtual operations on the machine. Alternatively, the operator may be informed that a tool required by a part program is unavailable at the machine, but defined by information in the machine's memory. The operator may then obtain the tool and add it to the available tools for the machine.
  • the data maintained in the machine's memory describing the available tools and the defined, but unavailable tools includes information about the physical characteristics and/or use of the tools. Throughout this description, this collection of data is referred to as "the tool library.”
  • source tools that are not identically matched to defined tools are identified as unmatched tools. These unmatched tools may be matched to similar, but not identical, defined tools of the same tool type.
  • the matching of the defined tools to the unmatched tools may be performed by the operator using the graphical user interface.
  • the algorithm for identifying the source tools and matching the source tools to the defined tools is used during importation of defined tools into the tool library to compare the imported defined tools with the previously defined tools to ensure that duplicates are not imported.
  • Figure 1 is a conceptual diagram of software components associated with the present invention.
  • FIG. 2 is a flow diagram of a tool management algorithm ("TMA") according to the present invention.
  • FIG. 3 is a flow diagram of a process control routine included in the TMA of Figure 2.
  • Figure 4 is a flow diagram of a tool matching algorithm included in the TMA of Figure 2.
  • FIG. 1 conceptually depicts a tool management algorithm ("TMA") 10, a part program 12, and a machine memory 14.
  • TMA 10 is described in greater detail below.
  • Part program 12 represents code for operation on a CNC machine to create a part.
  • Part program 12 includes a plurality of commands and other information used by the machine to move the spindle or the part, adjust the speed of spindle rotation, change tools, etc.
  • the commands and other information may be organized into sections or blocks representing operations 16, 18, 20 to be performed on the part.
  • Each operation 16, 18, 20 may include a numeric reference to a tool (e.g., tool 1, tool 2, tool n) needed to perform the corresponding operation 16, 18, 20.
  • Operations 16, 18, 20 further includes information describing the physical characteristics of the tools, including the tool type and geometry, and information describing the manner in which the tool is to be used.
  • the tool use information may include tool feed and speed specifications.
  • tool feed specifies how quickly the tool may be moved across the material
  • tool speed specifies how quickly to tool should be rotated.
  • Machine memory 14 conceptually includes a tool library, including defined tools as is further described below, which are depicted in Figure 1 as arranged in ATC grouping 22, MTC grouping 24, and unmatched grouping 26.
  • Groupings 22, 24, 26 are merely intended to indicate that certain of the defined tools in the library are associated with the ATC or the MTC, and other defined tools (unmatched grouping 26) are not associated with the ATC or the MTC.
  • ATC grouping 22 is depicted as including defined tools 30, 32, 34.
  • MTC grouping 24 is depicted as including defined tools 38, 40, 42.
  • Unmatched grouping 26 is depicted as including source tools 44, 46, 48.
  • defined tools 30, 32, 34, 38, 40, 42, 44, 46, 48 include the same types of information as source tools (i.e., numeric references and data describing physical characteristics and use specifications). Accordingly, unless otherwise stated or made clear by context, references throughout this description to "defined tools" are short hand for information about a tool associated with the machine, including its numeric reference and data describing its physical characteristics and use specifications.
  • Machine memory 14 further includes a map 36 associated with ATC grouping 22.
  • Map 36 includes information describing the physical position in the machine's ATC of the physical tools described by defined tools 30, 32, 34 of ATC grouping 22.
  • memory 14 may be a distributed memory including multiple memory devices at various physical locations which are accessible by the machine (or multiple machines), either directly or over a wired or wireless network. Alternatively, memory 14 may reside entirely on the machine.
  • defined tools 44, 46, 48 (only three shown to simplify the description) of unmatched grouping 26 are source tools from program 12 that do not match any defined tools in ATC grouping 22 or in MTC grouping 24 of the tool library. Even if defined tools 44, 46, 48 remain unmatched, the data may be used by the machine to perform virtual operations as is further described below.
  • TMA 10 When part program 12 is loaded onto a machine (e.g., transferred from a portable media to the machine controller or otherwise received by the controller from a source location), TMA 10 is executed. Various steps of TMA 10 are depicted in flow diagram 50 of Figure 2. Initially, TMA 10 processes the content of part program 12 to identify the source tools associated with operations 16, 18, 20. In this example, the source tools specified for operations 16, 18, 20 have numeric references 1, 2, and N, respectively. TMA 10 generates a listing of the source tools to be processed during loading of part program 12, including their numeric references and data describing their physical characteristics and use specifications. At step 52, TMA 10 determines whether the source tools need to be matched to defined tools included in the tool library. Initially, none of the source tools have been matched, so control is passed to step 54. TMA 10 then accesses source tool 16 and calls (step 56) a process control routine 58 ( Figure 3) to process source tool 16.
  • a process control routine 58 Figure 3
  • step 60 of routine 58 simply indicates that the input parameter for routine 58 is source tool 16.
  • routine 58 calls the tool matching algorithm 64 depicted in Figure 4 to evaluate defined tools 30, 32, 34 of ATC grouping 22.
  • algorithm 64 identifies any defined tools in ATC grouping 22 that satisfy the requirements of source tool 16 (i.e., defined tools that match source tool 16).
  • Step 66 indicates that the input parameters for algorithm 64 are source tool 16 and defined tools 30, 32, 34 of ATC grouping 22.
  • algorithm 64 accesses the first defined tool of ATC grouping 22 (i.e., defined tool 30).
  • algorithm 64 determines whether all of defined tools 30, 32, 34 in ATC grouping 22 have been processed.
  • step 72 algorithm 64 determines whether the tool type of defined tool 30 matches the tool type of source tool 16.
  • each source tool and each defined tool includes information identifying the type of tool (e.g., drill, end mill, etc.) described by the associated data.
  • the tool types do not match, then there is no point in further investigating the physical characteristics of the tools to determine if they match.
  • step 74 which causes algorithm 64 to access the next defined tool 32 in ATC grouping 22. Otherwise, control is passed to step 76, where the physical geometries of source tool 16 and defined tool 30 are compared.
  • algorithm 64 accesses information in source tool 16 describing a plurality of physical characteristics of the physical tool specified by source tool 16.
  • source tool 16 may specify a cut diameter value, a shank diameter value, a flute length value, etc.
  • Each of these physical characteristics may be compared to the corresponding data in defined tool 30 to calculate a compatibility index for defined tool 30.
  • the method of computing a compatibility index may vary for each tool type.
  • one or more threshold conditions must be satisfied during the comparison in order for it to proceed. For example, when comparing data associated with drills, step 76 may require that the diameters differ by no more than 0.000001 mm, and that the spin directions be identical. Further comparison is skipped unless both threshold conditions are met.
  • step 76 compares physical characteristics and computes the compatibility index by applying weighting factors to one or more of these geometry comparisons. For example, some of the physical characteristics may be considered more critical than others, and thus may have a heavier weighting factor.
  • the weighted comparisons result in a compatibility index value, for example, a value between zero and one.
  • the compatibility index value is compared to a threshold value. It should be understood, however, that in embodiments where a compatibility index is not computed, but rather tool matching criteria are applied to the tools under consideration, step 78 is a determination of whether the matching criteria are met. In one embodiment of the invention, during the automatic matching process described herein in association with loading of part program 12, the threshold value to which the compatibility index is compared is one, signifying an identical match of source tool 16 with the defined tool currently under consideration. It should be understood, however, that one of ordinary skill in the art may implement a different threshold value to permit matches that are less than identical. Step 78 determines whether the compatibility index value is equal to or exceeds the threshold (or whether the matching criteria are met, as the case may be).
  • step 70 algorithm 64 determines whether it has processed all of the defined tools in ATC grouping 22.
  • Algorithm 64 continues stepping through defined tools 30, 32, 34 of ATC grouping 22 and comparing them to source tool 16 in the manner described above until all of the defined tools of ATC grouping 22 have been processed.
  • algorithm 64 processes defined tools 30, 32, 34, it adds defined tools that match source tool 16 (if any) to the list created by step 80.
  • all of defined tools 30, 32, 34 of ATC grouping 22 are processed, and the result of step 70 is "yes.”
  • step 82 control is returned to process control routine 58 of Figure 3. Having completed step 62, routine 58 performs step 84 which again calls tool matching algorithm 64. During this execution of algorithm 64, all of defined tools 38, 40, 42 of MTC grouping 24 are processed in the manner described above with reference to ATC grouping 22. Any matches are added (at step 80) to the matched tools identified during processing of ATC grouping 22. When all of defined tools 38, 40, 42 of MTC grouping 24 have been processed, control is again returned at step 82 to process control routine 58.
  • process control routine 58 calls tool matching algorithm 64 to process unmatched tools 44, 46, 48 in unmatched grouping 26.
  • tool matching algorithm 64 may concurrently reside on the machine.
  • source tools may be added to unmatched tool grouping 26 if they do not match a defined tool in ATC grouping 22 or MTC grouping 24.
  • Later loaded part programs 12 may require source tools that match the unmatched tools from earlier loaded part programs 12.
  • unmatched tools 44, 46, 48 are not physical tools currently available for use in cutting operations, they may still be used for virtual operations or added, for example, to the MTC if a physical tool corresponding to the unmatched tool is obtained for use.
  • unmatched tools 44, 46, 47 is the same as that described above with regard to ATC grouping 22 and MTC grouping 24.
  • a source tool is matched to an unmatched tool in unmatched tool grouping 26, then the source tool is not added to unmatched tool grouping 26.
  • a source tool does not match any of defined tools 30, 32, 34 of ATC grouping 22, defined tools 38, 40, 42 of MTC grouping 24, or unmatched tools 44, 46, 48 of unmatched grouping 26, then the source tool is added to tool library as an unmatched tool.
  • TMA 10 prevents addition of duplicate unmatched tools to unmatched grouping 26.
  • TMA 10 determines whether any unmatched tools from the program are still needed by other part programs. If so, then those unmatched tools are left in unmatched grouping 26. Otherwise, they are removed.
  • the various matched tools stored at step 80 of algorithm 64 are sorted to determine the best match with source tool 16.
  • all of the matched tools may be identical in geometry to source tool 16 (i.e., if the threshold value to which the compatibility index value is compared is set to one).
  • the matched tools may not be identical geometric matches.
  • the primary sorting criteria in step 90 may be the compatibility index, which relates to the quality of the geometric match.
  • the matched tools may be automatically sorted by location.
  • the location order in terms of preference for sorting is the spindle, the ATC, the MTC, then unmatched tool grouping 26.
  • the spindle is preferred because the tool is already loaded.
  • the ATC is the next preference because the tool will be automatically loaded.
  • the MTC is the next preference because the tool is available for manual loading onto the spindle.
  • Unmatched grouping 26 is the next preference because the unmatched tools, although not physically available for use, are at least geometrically characterized and can be used in virtual operations including verification of part program 12.
  • step 92 of process control routine 58 control is returned to TMA 10 at step 94 of Figure 2.
  • TMA 10 determines whether all of the sorted and matched tools have been processed. At this point in the process, none of the matched tools have been processed, and control is passed to step 96 where the first matched tool is accessed from the sorted list. If no matches were identified during processing of the defined tools and unmatched tools, or if all of the matched tools had been processed, then the result of step 94 would be "no," and source tool 16 would be added to unmatched grouping 26 at step 98.
  • Step 100 determines whether the defined tool currently under consideration (here, defined tool 32) has already been matched to a source tool as is further described below. In this example we assume that defined tool 32 has not been associated with any source tool. Accordingly, at step 102 TMA 10 automatically correlates defined tool 32 with source tool 16 of part program 12.
  • the numeric reference for the tools to be matched may be used as the criteria for designating a matching tool. For example, if multiple defined tools satisfy the matching criteria, any defined tool having a numeric reference that is identical to the numeric reference of the source tool may automatically be designated a matched tool. As with all matched tools, the designated matched tool cannot thereafter be matched with another source tool, even if all matching criteria (except numeric tool reference) are met.
  • step 100 of algorithm 64 provides this feature.
  • the first source tool would be correlated with the first matched tool accessed in step 96.
  • TMA 10 determines that the first matched tool has not yet been matched to a source tool.
  • the first matched tool is correlated with the first source tool.
  • TMA 10 will access the first matched tool.
  • TMA 10 will determine that the first matched tool has already been associated with a source tool.
  • TMA 10 will then return to step 94. Assuming additional matched tools were identified by tool matching algorithm 64, the result of step 94 will be "yes,” and the next matched tool will be accessed at step 96.
  • TMA 10 will determine that the second matched tool has not been associated with a source tool.
  • TMA 10 will correlate the second matched tool with the second source tool. In this manner, a defined tool on the machine will not be correlated to two separate, but identical source tools required by part program 12.
  • TMA 10 After a matched tool is correlated with source tool 16 in the manner described above, TMA 10 returns to step 52 to determine whether additional source tools required by part program 12 need to be matched. Source tool 18 will be accessed at step 54.
  • TMA 10 calls process control routine 58, which executes tool matching algorithm 64 for each defined tool of ATC grouping 22 and MTC grouping 24, and each unmatched tool of unmatched grouping 26 in the manner described above.
  • one of the sorted matched tools identified during this processing (if any) is then correlated at step 102 with source tool 18 of part program 12.
  • all of the matched tools identified are displayed to the operator for manual selection. If no matched tools are found, then source tool 18 is added to unmatched grouping 26 at step 98.
  • the numeric reference for source tool 18 when added to unmatched grouping 26 will be the numeric reference associated with source tool 18 (i.e., tool 2) if that numeric reference is not already associated with another defined tool in tool library, otherwise it will be the next available numeric reference.
  • each of the source tools of part program 12 is processed in the above-described manner to be either matched to a defined tool or unmatched tool in tool library or stored in unmatched grouping 26.
  • TMA 10 will determine that all of the source tools of part program 12 have been processed, and control will pass to step 104 where TMA 10 replaces the original numeric tool references associated with the source tools with the numeric references of the correlated matched tools.
  • TMA 10 first identifies, for each source tool, all operations 16, 18, 20 in part program 12 that use the source tool. Then, TMA 10 replaces the original tool references with the matched tool references identified above. The following example illustrates this process.
  • Operation 1 Source tool 1 (roughing); Source tool 2 (finishing) Operation 2: Source tool 3 (roughing); Source tool 2 (finishing) Operation 3: Source tool 1 (roughing); Source tool 4 (finishing)
  • TMA 10 identifies the operations in part program 12 that use each of the originally referenced source tools:
  • Source tool 1 Operation 1 (roughing), Operation 3 (roughing)
  • Source tool 2 Operation 1 (finishing), Operation 2 (finishing)
  • Source tool 3 Operation 2 (roughing)
  • Source tool 4 Operation 3 (finishing)
  • Source tool 1 matched to matched tool 4
  • Source tool 2 matched to matched tool 1
  • Source tool 3 matched to matched tool 2
  • Source tool 4 matched to matched tool 10
  • TMA 10 avoids replacing a matched tool reference with another matched tool reference. After this replacement process, TMA 10 ends at step 106.
  • TMA 10 checks the tool use information (i.e., the feed and speed information) corresponding to the source tools to determine whether that information was manually programmed into part program 12. Some operators modify the default feed and speed information provided with the tool. During creation of part program 12, the feed and speed information may either be imported, for example, from memory 14 when the tool is defined, or manually entered. If the information is manually entered, then a flag is set in association with the information to indicate manual entry. TMA 10 identifies these flags in making the manual entry determination. In one embodiment of the invention, if the feed and speed information was manually entered, then TMA 10 retains it. If the feed and speed information was not manually entered, then TMA 10 replaces it with the feed and speed information associated with the matched tool during the replacement process described above.
  • the feed and speed information may either be imported, for example, from memory 14 when the tool is defined, or manually entered. If the information is manually entered, then a flag is set in association with the information to indicate manual entry. TMA 10 identifies these flags in making the manual entry determination
  • an "unmatched tool(s)" message is displayed to the operator after part program 12 is loaded.
  • the operator has the option of selecting a tool review screen, which lists all of the source tools and the location of their matches (i.e., the spindle, the ATC, the MTC, or in unmatched grouping 26). If no matched tool was found, the source tool is identified as an "unmatched tool.” The operator may match unmatched tools with similar, but not identical, defined tools in ATC grouping 22 or MTC grouping 24.
  • TMA 10 is again executed for the selected unmatched tool. For this unmatched tool operation, however, TMA 10 begins execution at step 60 of process control routine 58 and ends execution at step 92 as described below. Additionally, the threshold associated with step 78 of tool matching algorithm 64 is set to zero instead of one.
  • the input parameter is the unmatched tool.
  • Step 62 calls tool matching algorithm 64 of Figure 4 to locate matching tools in ATC grouping 22 in the manner described above.
  • algorithm 64 instead of computing a compatibility index value for each defined tool 30, 32, 34 of the same tool type as the unmatched tool, algorithm 64 sets the compatibility index to zero and assigns a percentage match based on the diameter of the defined tool 30, 32, 34. For example, a defined tool having a diameter that is identical to the diameter specified for the unmatched tool is assigned a percentage match of 100%. A defined tool have a diameter twice the size of the diameter specified for the unmatched tool data block is assigned a percentage match of 200%, and so on.
  • step 78 As the threshold for step 78 is zero during the unmatched tool operation, every defined tool 30, 32, 34 processed by step 78 will be added to the list of matched tools. This same process is performed at steps 84, 86, and 88 of process control routine 58 for defined tools 38, 40, 42 of MTC grouping 24. The list of matched tools may then be sorted at step 90 of process control routine 58 in order of percentage match. Finally, the sorted list of matched tools is displayed to the operator, along with the locations (i.e., the ATC or the MTC) of the matched tools. The operator then selects a matched tool from the list and it is used to replace the previously unmatched source tool required by part program 12 in the manner described above.
  • a tool matched to a source tool required by part program 12 need not have a corresponding physical tool on the machine (i.e., a tool in the spindle, the ATC, or the MTC). If the operator executes part program 12 and a source tool has been correlated to an unmatched tool of unmatched grouping 26, then TMA 10 will display a message to the operator indicating that a physical tool is not present for one or more of the source tools.
  • the operator may load a physical tool on the machine by placing it, for example, in the ATC and creating a corresponding defined tool in the tool library. Alternatively, the operator may select an option of defining the tool and adding it to the MTC for manual loading at the appropriate time. Even if the operator does not obtain a physical tool, the operator may cause the machine to perform virtual operations using the unmatched tool such as a graphical verification of part program 12.
  • TMA 10 may be used when defined tools are added to the tool library.
  • the tool library may be updated with new defined tools from part programs or back-up files, with defined tools located in a central library server, etc. Regardless of the source of the defined tool for importation into the tool library, TMA 10 may be executed to prevent importation of duplicate defined tools.
  • an operator may identify a source tool in a part program that the operator would like to import to tool library of a particular machine. Instead of executing the tool matching process of TMA 10 described above, the operator may execute a tool importation process wherein all source tools in the part program are imported into tool library if they do not already exist in tool library.
  • TMA 10 accesses the first source tool (steps 52 and 54), and calls process control routine 58 (step 56). The input parameter at step 60 of routine 58 is the first source tool.
  • TMA 10 calls tool matching algorithm 64 to compared defined tools 30, 32, 34 of ATC grouping 22 to the first source tool in the manner described above.
  • the compared tools must be identical to be considered a match. If a matched tool is identified, the first source tool is not imported into the tool library because it would constitute a duplicate. If no matched tool is identified, defined tools 38, 40, 42 of MTC grouping 24 are processed (step 84) in the same manner. Again, if a match is found, the source tool is not added to the tool library. If none of the defined tools in ATC grouping 22 or MTC grouping 24 match the source tool, it is added to the tool library. This procedure is repeated for the remaining source tools.

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  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Numerical Control (AREA)
  • Multi-Process Working Machines And Systems (AREA)

Abstract

L'invention concerne un système et une méthode de gestion de l'utilisation des outils selon lesquels un centre d'usinage numérique mémorise les informations identifiant les outils associés à la machine ainsi que leurs emplacements actuels (le cas échéant), et exécute un algorithme pour déterminer les outils source nécessaires au programme de réalisation d'une pièce et pour comparer les outils source avec les outils disponibles.
EP07813812A 2006-08-04 2007-08-06 Systeme et methode de gestion de l'utilisation des outils Active EP2049958B1 (fr)

Applications Claiming Priority (2)

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US82148106P 2006-08-04 2006-08-04
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US7684891B2 (en) 2010-03-23
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